For example, when people expand a tweet containing a news article from the "growing group" of Twitter partner sites, people will see a headline, introduction and sometimes the Twitter accounts of the publisher and writer (see right).

"People can preview articles from news sources like The New York Times, see images from websites like WWE and play dynamic content from broadcasters like BET," Twitter's Robert Weeks told Mashable.

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is a leading source for news, information and resources for the Connected Generation. Mashable reports on the importance of digital innovation and how it empowers and inspires people around the world. Mashable's record 42 million unique visitors worldwide and 21 million social media followers are one of the most influential and engaged online communities. Founded in 2005, Mashable is headquartered in New York City with an office in San Francisco.